Two minors and one adult were transported to Advocate Christ Medical Center in Oak Lawn. "They were all in good condition," Hanson said. "The minors were shaken up a little more than the adults were."

The pilot refused transportation. He said the pilot may have initially judged the park to be a good place for an emergency landing. But when he got close enough to see all the people, he aimed for the retention pond to the west.

"I think the guy did a very good job landing the plane," said Hanson. Giving no indication of what forced the plane to make an emergency landing, Hanson said the state police and the FAA will investigate.

The plane is registered to WOMA LLC. Aviation Professionals Inc. was connected to the same address as WOMA LLC, but when contacted a person on the phone said they had no details about the crash.